M55800A Atmel Corporation, M55800A Datasheet - Page 6

• Manufacturer Part Number: M55800A
• Manufacturer: Atmel Corporation

Specifications of M55800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 176
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 58
• Ext Interrupts: 58
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 72
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3/5.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Junction Temperature
6
AT91M55800A
The average chip-junction temperature T
1.
2.
Where:
•
•
•
•
•
From the first equation, the user can derive the estimated lifetime of the chip and
thereby decide if a cooling device is necessary or not. If a cooling device is to be fitted
on the chip, the second equation should be used to compute the resulting average chip-
junction temperature T
on page 5.
provided in Table 6 on page 5.
datasheet.
P
“Power Consumption” on page 4.
T
T
T
JA
JC
HEAT SINK
A
J
D
J
= ambient temperature (°C).
= device power consumption (W) estimated from data provided in the section
=
= package thermal resistance, Junction-to-ambient (°C/W), provided in Table 6
=
= package thermal resistance, Junction-to-case thermal resistance (°C/W),
T
T
A
A
+
+
= cooling device thermal resistance (°C/W), provided in the device
P
P
D
D
HEATSINK
JA
J
in °C.
+
JC
J
in °C can be obtained from the following:
1727E–ATARM–01/04